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单词
地球时
释义
地球时
Encyclopedia
工学
时标
释
terrestrial time
地球时
由国际天文联合会(IAU)定义的现代天文时间标准。是以秒为基本单位的理论理想时标,英文缩写TT。主要服务于在地表上进行的天文观测。
理学
坐标时
释
terrestrial time
地球时
地心坐标系的一种坐标时。简称TT。
Astronomy
全称:Terrestrial Time。缩写:TT
地球时
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